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[flahy] /flaɪ/

noun, plural flies.
Also called true fly. any of numerous two-winged insects of the order Diptera, especially of the family Muscidae, as the common .
any of various winged insects, as the or .
Angling. a fishhook dressed with hair, feathers, silk, tinsel, etc., so as to resemble an insect or small fish, for use as a lure or bait.
(initial capital letter) Astronomy. the constellation Musca.
fly in the ointment, a detrimental factor; detraction:
If there’s one fly in the ointment, it’s that there may not be the money to finish the job.
verb flies, flying, flew, flown
(intransitive) (of birds, aircraft, etc) to move through the air in a controlled manner using aerodynamic forces
to travel over (an area of land or sea) in an aircraft
to operate (an aircraft or spacecraft)
to float, flutter, or be displayed in the air or cause to float, etc, in this way: to fly a kite, they flew the flag
to transport or be transported by or through the air by aircraft, wind, etc
(intransitive) to move or be moved very quickly, forcibly, or suddenly: she came flying towards me, the door flew open
(intransitive) to pass swiftly: time flies
to escape from (an enemy, place, etc); flee: he flew the country
(intransitive; may be foll by at or upon) to attack a person
(intransitive) to have a sudden outburst: he flew into a rage again
(intransitive) (of money, etc) to vanish rapidly
(transitive) (falconry) (of hawks) to fly at (quarry) in attack: peregrines fly rooks
(transitive) (theatre) to suspend (scenery) above the stage so that it may be lowered into view
fly a kite

(informal) fly high

fly in the face of, See face (sense 19)
(informal) fly off the handle, to lose one’s temper
(US & Canadian, informal) fly the coop, to leave suddenly
(US & Canadian, informal) go fly a kite, go away
(informal) let fly

noun (pl) flies
(often pl) Also called fly front. a closure that conceals a zip, buttons, or other fastening, by having one side overlapping, as on trousers
Also called fly sheet

a small air brake used to control the chiming of large clocks
the horizontal weighted arm of a fly press

(Brit) a light one-horse covered carriage formerly let out on hire
(Austral & NZ) an attempt: I’ll give it a fly

(pl) (theatre) the space above the stage out of view of the audience, used for storing scenery, etc
(rare) the act of flying
noun (pl) flies
any dipterous insect, esp the housefly, characterized by active flight See also horsefly, blowfly, tsetse fly, crane fly
any of various similar but unrelated insects, such as the caddis fly, firefly, dragonfly, and chalcid fly
(angling) a lure made from a fish-hook dressed with feathers, tinsel, etc, to resemble any of various flies or nymphs: used in fly-fishing See also dry fly, wet fly
(in southern Africa) an area that is infested with the tsetse fly
(Austral, slang) drink with the flies, to drink alone
fly in amber, See amber (sense 2)
(informal) fly in the ointment, a slight flaw that detracts from value, completeness, or enjoyment
fly on the wall, a person who watches others, while not being noticed himself or herself
(informal) there are no flies on him, he is no fool
adjective (slang) flyer, flyest
(mainly Brit) knowing and sharp; smart
(mainly Scot) furtive or sneaky
(mainly Scot) on the fly, in secret; sneakily

Old English fleoge “fly, winged insect,” from Proto-Germanic *fleugjon (cf. Old Saxon fleiga, Old Norse fluga, Middle Dutch vlieghe, Dutch vlieg, Old High German flioga, German Fliege “fly); literally “the flying (insect)” (cf. Old English fleogende “flying”), from same source as fly (v.1).

Originally any winged insect (hence butterfly, etc.); long used by farmers and gardeners for any insect parasite. The Old English plural in -n (cf. oxen) gradually normalized 13c.-15c. to -s. Fly on the wall “unseen observer” first recorded 1881. An Old English word for “curtain” was fleonet “fly-net.” Fly-swatter first attested 1917. Fly-fishing is from 1650s.

“to soar through air,” Old English fleogan “to fly” (class II strong verb; past tense fleag, past participle flogen), from West Germanic *fleuganan (cf. Old Saxon and Old High German fliogan, Old Norse flügja, Old Frisian fliaga, Middle Dutch vlieghen, Dutch vliegen, German fliegen), from PIE *pleu- “flowing, floating” (see pluvial).

Notion of “flapping as a wing does” led to noun sense of “tent flap” (1810), which yielded (1844) “covering for buttons that close up a garment.” The noun sense of “a flight, flying” is from mid-15c. Baseball fly ball attested by 1866. Slang phrase fly off the handle “lose one’s cool” dates from 1825. To do something on the fly is 1856, apparently from baseball.

“run away,” Old English fleon (see flee). Fleogan and fleon were often confused in Old English, too. Modern English distinguishes in preterite: flew/fled.

slang, “clever, alert, wide awake,” late 18c., perhaps from fly (n.) on the notion of the insect being hard to catch. Other theories, however, trace it to fledge or flash. Slang use in 1990s might be a revival or a reinvention.

fly (flī)
Any of numerous two-winged insects of the order Diptera.
Any of numerous insects of the order Diptera, having one pair of wings and large compound eyes. Flies include the houseflies, horseflies, and mosquitoes. See more at dipteran.



Related Terms

barfly, catch flies, fruit fly, let fly, no flies on, on the fly, shoo-fly

[the first adjective sense, ”clever, alert, etc,” is of unknown origin, though it is conjectured that it may refer to the difficulty of catching a fly in midair, that it may be cognate with fledge and hence mean ”accomplished, proven, seasoned,” and that it is a corruption of fla, a shortening of flash; the third verb sense, ”succeed, persuade, etc,” is fr a cluster of jokes and phrases having to do with the Wright Brothers’ and others’ efforts to get something off the ground and make it fly; the two adjective senses involve either a survival or a revival of an early 19thcentury British underworld term of unknown origin]

Heb. zebub, (Eccl. 10:1; Isa. 7:18). This fly was so grievous a pest that the Phoenicians invoked against it the aid of their god Baal-zebub (q.v.). The prophet Isaiah (7:18) alludes to some poisonous fly which was believed to be found on the confines of Egypt, and which would be called by the Lord. Poisonous flies exist in many parts of Africa, for instance, the different kinds of tsetse. Heb. ‘arob, the name given to the insects sent as a plague on the land of Egypt (Ex. 8:21-31; Ps. 78:45; 105:31). The LXX. render this by a word which means the “dog-fly,” the cynomuia. The Jewish commentators regarded the Hebrew word here as connected with the word _’arab_, which means “mingled;” and they accordingly supposed the plague to consist of a mixed multitude of animals, beasts, reptiles, and insects. But there is no doubt that “the _’arab_” denotes a single definite species. Some interpreters regard it as the Blatta orientalis, the cockroach, a species of beetle. These insects “inflict very painful bites with their jaws; gnaw and destroy clothes, household furniture, leather, and articles of every kind, and either consume or render unavailable all eatables.”


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